Home / 13,979.70-20,976.85-5,665.86

Finding the Fourth Proportional to 13,979.70, 20,976.85 and 5,665.86

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Solution

The fourth proportional to 13,979.70, 20,976.85 and 5,665.86 is: 8,501.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.70 : 20,976.85 = 5,665.86 : x
  2. Step 2: Convert to fraction form
    13,979.70/20,976.85 = 5,665.86/x
  3. Step 3: Cross multiply
    13,979.70x = 20,976.85 × 5,665.86
  4. Step 4: Simplify right side
    13,979.70x = 118,851,959.84
  5. Step 5: Solve for x
    x = 118,851,959.84/13,979.70
  6. Step 6: Final answer
    x = 8,501.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.